The main magnetic properties of permanent magnet materials are: remanence (Jr, Br), coercivity (Hcb), intrinsic coercivity (Hcj), and magnetic energy product (BH) max. The magnetic properties of the permanent magnet materials we usually refer to are the four items. Other magnetic properties of permanent magnet materials include: Curie temperature (Tc), operating temperature (Tw), reversible temperature coefficient of remanent magnetism and intrinsic coercivity (α, β), and reductive permeability (μrec) demagnetization curve. Squareness (Hk/Hcj), high-temperature demagnetization performance, and uniformity of magnetic properties.

In addition to magnetic properties, the physical properties of permanent magnet materials include density, electrical conductivity, thermal conductivity, thermal expansion coefficient, etc. Mechanical properties include Vickers hardness, compressive strength, impact toughness and so on. In addition, an important one of the performance indicators of permanent magnet materials is the surface state and its corrosion resistance.